code: def check_call(self):
      xp = self.link.xp
      x = chainer.Variable(
          xp.random.uniform(
              low=-1, high=1, size=(2, 3, 128, 160)
          ).astype(np.float32)
      )
      y = self.link(x)
  
      self.assertIsInstance(y, chainer.Variable)
      self.assertIsInstance(y.array, xp.ndarray)
      self.assertEqual(y.shape, (2, self.n_class, 128, 160))
  
file_path: chainercv/tests/links_tests/model_tests/segnet_tests/test_segnet_basic.py
imports: import numpy
  import unittest
  import chainer
  from chainer import testing
  from chainer.testing import attr
  from chainercv.links import SegNetBasic
  from chainercv.utils import assert_is_semantic_segmentation_link
label_desc: Use image node_id 2 for calling the TestSegNetBasic obj's underlying member method code with example usage: obj.check_call() without return types